Outside of Conan, Andy hasn't done well for himself.
Both his TV shows have bombed and he's only made marginal appearances in movies.
It almost doesn't surprise me that he's back to being Conan's sidekick, but then again, he's great under his aegis.
I still love Letterman, but I agree, he's getting old. I cringe at the fact that he doesn't do "CBS Mailbag" anymore and the fact that he cuts the Top 10 list out of a crapload of his broadcasts. He's 62, and Carson was 66 when he retired. I think he'll call it quits when his contract expires.
As for Joel Goddard - Conan's announcer on Late Night - sounds like he's staying in New York with his Asian boyfriend.